What did you make that casting mold from? I have now tried 2 things that did not work. Candle wax, and a pourable latex called  "mold builder." both ended up pulling away from the impression. the the latex mold builder was not it says you're supposed to paint on the mold one layer at a time...

I decided to make my wife some IEM's too, I'm doing "dual driver" for her. It's being accomplished with a single Knowles GQ

Quote: My Impressions were done by an audiologist. I'm keeping the price low by using my impressions from my old IEM's. They still fit and seal well, so I'm not too worried about my ear canal changes.

What are peoples thoughts on using wax as the negative mold material?

Quote: Can you explain why?

Quote:   No, It's from a circuit design software called tinycad (open source). The reason I put the 1st resistor up so high is because when I wire the drivers in parallel, the impedance drop is huge. I'm going for ~ 30 Ohms of impedance on this circuit ... however that's 30 Ohms and 1KHz...

Please Help, does this look alright?  

Any circuit people out there to check this diagram?   I'm having the crossover point on the sonion at 85Hz and I'm trying to keep the overall impedance at ~30 Ohms  

  Quote:   I got it from Nusil (linked in an above post)  

I can't order a 33A007 from sonion. They said they only sell quantities. Anyone know of a way I can buy 2?

Where can one pick up recessed sockets that will work with the Westone Epic cable? I'm trying to use amazon for most my parts.

Here's a starter, the pink are my original impressions, the shells fit my old UM1's. and that little BA driver is a Knowles 8507.   I will be using some cheap mold material to make the negative. Sensaphonic definitely grinds some stuff out. I don't think I will be using tubes, I want to make...

Today I purchased some Medical Grade Silicone.   http://www.nusil.com/library/products/MED4-4220P.pdf

Today I called NuSil and purchased med4-4220   http://www.nusil.com/library/products/MED4-4220P.pdf   I will update on a Thread I started. http://www.head-fi.org/t/603916/diy-silicone-iems-input-welcome   Quote:  

Anyone know of a low-pass or band pass circuit I could use for this project that does not use an inductor?

So I'm finding the prices of medical grade silicone, and pigment, and also the cable to be some of the most expensive parts of this whole thing.

For sure Balanced Armature. It seems like there's a reason for the back port and I thought it was for low-end.   Both of those Drivers I listed are BA   Quote:  

Thank you, although I am looking for suppliers from the states :)   Yes, that is a great thread, I'm about 30% through it and I've been reading it the past 3 days.

Hello,   So I'm starting a new IEM project, I have desired to have Sensaphonics IEM's for the longest time ever since they made my shells for  the the classic Westone UM1/Shure E1. I really wanted some 3MAXs but I just don't have that kind of money (~$1000). Since reading through these...